I have a 1993 bronco, that the engine will not idle on. When I give it gas. it backfires and has no power. Funky smelling smoke comes out of breather and the dip stick, when you put a rag over them there is oil on the rag. we did a engine flush, it helped but did not fix the problem 100% still acting really rough any ideas?
Thank you,
Ornonic

 

When was the last time it ran correctly?

Did this start on it's own, or did it start after work was done on it?